641026 has 4 divisors (see below), whose sum is σ = 961542. Its totient is φ = 320512.

The previous prime is 640993. The next prime is 641051. The reversal of 641026 is 620146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 600625 + 40401 = 775^2 + 201^2 .

It is a junction number, because it is equal to n+sod(n) for n = 640994 and 641012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160255 + ... + 160258.

2⁶⁴¹⁰²⁶ is an apocalyptic number.

641026 is a deficient number, since it is larger than the sum of its proper divisors (320516).

641026 is a wasteful number, since it uses less digits than its factorization.

641026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320515.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 641026 is about 800.6409932048. The cubic root of 641026 is about 86.2234140561.

The spelling of 641026 in words is "six hundred forty-one thousand, twenty-six".